diff --git a/installer/src/main.rs b/installer/src/main.rs
index de785b8..a975056 100644
--- a/installer/src/main.rs
+++ b/installer/src/main.rs
@@ -73,6 +73,16 @@ enum UtilSubCommand {
     WingtechStartTelnet(WingtechArgs),
     /// Root the Wingtech and launch adb.
     WingtechStartAdb(WingtechArgs),
+    /// Send a file to the TP-Link device over telnet.
+    ///
+    /// Before running this utility, you need to make telnet accessible with `installer util
+    /// tplink-start-telnet`.
+    TplinkSendFile(TplinkSendFile),
+    /// Send a file to the Wingtech device over telnet.
+    ///
+    /// Before running this utility, you need to make telnet accessible with `installer util
+    /// wingtech-start-telnet`.
+    WingtechSendFile(WingtechSendFile),
 }
 
 #[derive(Parser, Debug)]
@@ -82,6 +92,28 @@ struct TplinkStartTelnet {
     admin_ip: String,
 }
 
+#[derive(Parser, Debug)]
+struct TplinkSendFile {
+    /// IP address for TP-Link admin interface, if custom.
+    #[arg(long, default_value = "192.168.0.1")]
+    admin_ip: String,
+    /// Local path to the file to send.
+    local_path: String,
+    /// Remote path where the file should be stored on the device.
+    remote_path: String,
+}
+
+#[derive(Parser, Debug)]
+struct WingtechSendFile {
+    /// IP address for Wingtech admin interface, if custom.
+    #[arg(long, default_value = "192.168.1.1")]
+    admin_ip: String,
+    /// Local path to the file to send.
+    local_path: String,
+    /// Remote path where the file should be stored on the device.
+    remote_path: String,
+}
+
 #[derive(Parser, Debug)]
 struct WingtechArgs {
     /// IP address for Wingtech admin interface, if custom.
@@ -134,6 +166,12 @@ async fn run() -> Result<(), Error> {
             UtilSubCommand::TplinkStartTelnet(options) => {
                 tplink::start_telnet(&options.admin_ip).await?;
             }
+            UtilSubCommand::TplinkSendFile(options) => {
+                util::send_file(&options.admin_ip, &options.local_path, &options.remote_path).await?;
+            }
+            UtilSubCommand::WingtechSendFile(options) => {
+                util::send_file(&options.admin_ip, &options.local_path, &options.remote_path).await?;
+            }
             UtilSubCommand::WingtechStartTelnet(args) => wingtech::start_telnet(&args.admin_ip, &args.admin_password).await.context("\nFailed to start telnet on the Wingtech CT2MHS01")?,
             UtilSubCommand::WingtechStartAdb(args) => wingtech::start_adb(&args.admin_ip, &args.admin_password).await.context("\nFailed to start adb on the Wingtech CT2MHS01")?,
         }
diff --git a/installer/src/util.rs b/installer/src/util.rs
index 1f7ce86..1974d90 100644
--- a/installer/src/util.rs
+++ b/installer/src/util.rs
@@ -1,8 +1,9 @@
 use std::io::Write;
 use std::net::SocketAddr;
+use std::str::FromStr;
 use std::time::Duration;
 
-use anyhow::{Result, bail};
+use anyhow::{Context, Result, bail};
 use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::net::TcpStream;
 use tokio::time::{sleep, timeout};
@@ -88,3 +89,19 @@ pub async fn telnet_send_file(addr: SocketAddr, filename: &str, payload: &[u8])
     println!("ok");
     Ok(())
 }
+
+pub async fn send_file(admin_ip: &str, local_path: &str, remote_path: &str) -> Result<()> {
+    let file_content = std::fs::read(local_path)
+        .with_context(|| format!("Failed to read local file: {}", local_path))?;
+
+    println!("Connecting to {admin_ip}");
+    let addr = SocketAddr::from_str(&format!("{admin_ip}:23"))
+        .with_context(|| format!("Invalid IP address: {}", admin_ip))?;
+
+    telnet_send_file(addr, remote_path, &file_content)
+        .await
+        .with_context(|| format!("Failed to send file {} to {}", local_path, remote_path))?;
+
+    println!("Successfully sent {} to {}", local_path, remote_path);
+    Ok(())
+}